EP0699487A1 - Extrusionsdüse - Google Patents

Extrusionsdüse Download PDF

Info

Publication number
EP0699487A1
EP0699487A1 EP95202102A EP95202102A EP0699487A1 EP 0699487 A1 EP0699487 A1 EP 0699487A1 EP 95202102 A EP95202102 A EP 95202102A EP 95202102 A EP95202102 A EP 95202102A EP 0699487 A1 EP0699487 A1 EP 0699487A1
Authority
EP
European Patent Office
Prior art keywords
extrusion
portholes
die
cavities
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95202102A
Other languages
English (en)
French (fr)
Inventor
Ole Porksen
Gunnar Brodersen
Egon Skov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norsk Hydro ASA
Original Assignee
Norsk Hydro ASA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norsk Hydro ASA filed Critical Norsk Hydro ASA
Priority to EP95202102A priority Critical patent/EP0699487A1/de
Publication of EP0699487A1 publication Critical patent/EP0699487A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding

Definitions

  • the invention relates to an extrusion die for the extrusion of hollow extrusion products, and having at least two extrusion cavities each connected to at least two portholes, especially an extrusion die for aluminium or aluminium alloys.
  • a die with more than one extrusion cavity is generally known in the art.
  • For the extrusion of aluminium profiles use can be made of different types of dies.
  • a first type is the so called flat die comprising generally a feeder contacting the aluminium billet to be extruded, a die plate and a backer
  • the die plate comprises a number of extrusion cavities, through which the extrusion takes place, the portion of which adjacent to the aluminium billet to be extruded having a cross section corresponding to the cross section of the extrusion product.
  • the remainder of the extrusion cavity has a grandually increasing corss-section thus providing a free-running guidance for the extruded profile.
  • the flat die can be used for profiles with open configuration, i.e. profile with no tube-like portions in it.
  • the die is composed of a bridge, the die plate and a backer.
  • the backer is basically identical to the backer of the flat die and provides free-running channels for the extruded profile.
  • the die plate comprises at least one extrusion cavity the portion adjacent to the billet to be extruded having a cross-section the outer circumference of which corresponds to the outer circumference of the cross-section of the profile to be obtained.
  • the remainder of the extrusion cavity has also a gradually increasing cross-section providing a free-running guidance for the extruded profile.
  • the extrusion cavity is connected to a recess, which is part of the porthole system to be described hereinafter.
  • the bridge has basically at least two so called portholes facing the billet to be extruded.
  • the portholes are separated from each other by bridge portions.
  • the side of the bridge facing the die plates is provided with a mandrel. In assembled condition the mandrel is extending into the extrusion cavity of the die plate, thereby defining the inner and outer circumference of the profile to be extruded.
  • the portholes in the bridge and the recess in the die plate together constitute the flow channels of the aluminium to be extruded through the extrusion cavities. These flow channels as a whole are commonly called the portholes.
  • Dies of the hollow type can also be provided with multiple extrusion cavities.
  • a special form of dies, especially used for producting thinwalled multiport extrusion tubes having a number of parallel channels is a die comprising a die holder and a die plate to be positioned in the die holder.
  • the die holder is provided with the portholes and the bridge portions thus giving support to a mandrel extending into the extrusion cavities of the die plate to be provided in the holder.
  • Such a type of die will be described in more detail hereinafter.
  • At least one porthole of each extrusion cavity is connected to one porthole of an adjacent extrusion cavity by means of at least one channel.
  • an extrusion die 20 comprising a die holder 1 for a two-cavities-extrusion die.
  • the die holder is provided with four portholes 2,8 and 3,9.
  • the die holder 1 further has two recesses 15, 16 for receiving a die plate (not shown).
  • Each die plate being provided with an extrusion cavity in accordance with the circumference of the cross-section of the extrusion profile to be made.
  • the bridge portion may be provided with a mandrel (not shown) extending into the extrusion cavity of the corresponding die plate and thus providing the inner circumference of the extrusion profile to be made.
  • a channel 6 has been provided, and between the portholes 8, 9 a second channel 7 has been provided.
  • the channels are positioned as close as possible to the die plate, and are able to provide a pressure equalisation between the portholes. It is supposed that in this area the temperature and pressure in the metal to be extruded is such that a nearly fluid state is reached whereby such a pressure equalisation can be obtained. As a result of this pressure equalisation, the extrusion speed between both cavities becomes nearly the same, thereby providing a constant quality in extruded products independent of the extrusion cavity. This is especially important for thin walled product such as heat exchanger tubes, especially as used in air conditioning systems for cars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
EP95202102A 1994-08-02 1995-08-02 Extrusionsdüse Withdrawn EP0699487A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95202102A EP0699487A1 (de) 1994-08-02 1995-08-02 Extrusionsdüse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP94202225 1994-08-02
EP94202225 1994-08-02
EP95202102A EP0699487A1 (de) 1994-08-02 1995-08-02 Extrusionsdüse

Publications (1)

Publication Number Publication Date
EP0699487A1 true EP0699487A1 (de) 1996-03-06

Family

ID=26136468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95202102A Withdrawn EP0699487A1 (de) 1994-08-02 1995-08-02 Extrusionsdüse

Country Status (1)

Country Link
EP (1) EP0699487A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780170A1 (de) * 1995-12-22 1997-06-25 Yugen Kaisha Yano Engineering Matrize zum Stangpressen von Hohlkörpern
EP0987068A3 (de) * 1998-09-16 2001-06-13 Alusuisse Technology & Management AG Verfahren zum Strangpressen eines Hohlprofils od.dgl. Körpers aus einem Barren sowie Vorrichtung dafür
WO2011099868A1 (en) * 2010-02-12 2011-08-18 Norsk Hydro Asa Modular extrusion die

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111586B (de) * 1958-03-29 1961-07-27 Hydraulik Gmbh Presskopf fuer Kabelummantelungspressen mit zwei gleichachsig einander gegenueberliegenden Aufnehmern
US3063560A (en) * 1959-01-29 1962-11-13 Babcock & Wilcox Co Multi-port extrusion die
DE1909574A1 (de) * 1968-03-18 1970-09-17 Rias Walsdorf Verfahren und Einrichtung zur Herstellung von mehreren Stuecken Stabmaterial in einem kombinierten Strangpress-Walzvorgang
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111586B (de) * 1958-03-29 1961-07-27 Hydraulik Gmbh Presskopf fuer Kabelummantelungspressen mit zwei gleichachsig einander gegenueberliegenden Aufnehmern
US3063560A (en) * 1959-01-29 1962-11-13 Babcock & Wilcox Co Multi-port extrusion die
DE1909574A1 (de) * 1968-03-18 1970-09-17 Rias Walsdorf Verfahren und Einrichtung zur Herstellung von mehreren Stuecken Stabmaterial in einem kombinierten Strangpress-Walzvorgang
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780170A1 (de) * 1995-12-22 1997-06-25 Yugen Kaisha Yano Engineering Matrize zum Stangpressen von Hohlkörpern
EP0987068A3 (de) * 1998-09-16 2001-06-13 Alusuisse Technology & Management AG Verfahren zum Strangpressen eines Hohlprofils od.dgl. Körpers aus einem Barren sowie Vorrichtung dafür
WO2011099868A1 (en) * 2010-02-12 2011-08-18 Norsk Hydro Asa Modular extrusion die
US20130047692A1 (en) * 2010-02-12 2013-02-28 Marco Pasqualon Modular extrusion die

Similar Documents

Publication Publication Date Title
US5567493A (en) Die for extrusion of multi-hole tube and multi-hole tube made with the die
US20060168812A1 (en) Method of forming heat exchanger tubing and tubing formed thereby
CA2288717C (en) Heat exchanger
US5323851A (en) Parallel flow condenser with perforated webs
EP0717251A2 (de) Wärmetauscherrohr mit länglichem Querschnitt
JPH06117790A (ja) 熱交換器
CA2303371A1 (en) Microchannel laminated mass exchanger and method of making
US8104318B2 (en) Extrusion die for metallic material
HUP0204219A2 (hu) Többcsatornás hűtőszerszám
US20040251014A1 (en) High pressure manifold
WO2013116177A2 (en) Method for fabricating flattened tube finned heat exchanger
US20020017372A1 (en) Metal hollow member and method for manufacturing the same
US6200119B1 (en) Extrusion calibrator with modular calibrating cassette
EP0699487A1 (de) Extrusionsdüse
CA2155154A1 (en) Extrusion die
US6206680B1 (en) Extrusion die membrane
JP5504044B2 (ja) 押出加工用ダイス装置及び押出部品の製造方法
EP2997322B1 (de) Verfahren zur herstellung einer mehrfachverteileranordnung mit internen kommunikationsports
JP2007253184A (ja) 中空押出形材成形用ダイス
JP4164146B2 (ja) 熱交換器、及びこれを用いたカー・エアコン
JP2563968B2 (ja) 複数多穴管の一体押出方法
KR100495106B1 (ko) 다공 튜브재 압출용 다이스
CN108555051B (zh) 分流板、铝合金管材挤压模及其成型方法
EP0795365A1 (de) Verfahren zur Herstellung eines Strömungsrohres mit veränderlichem Querschnitt
EP0906796A1 (de) Verfahren zur Herstellung eines Wärmetauschers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19960725